I have two measures of quarter notes. In playing them back only every other note plays.
Assuming four beats to a measure, only the first and third note play.
Any suggestions?

Assuming this is a question about MIDI, try increasing the "Prepare using nnn Millisecond Buffers" parameter in Preferences > MIDI > Playback and Recording from 250 to 500 or 750

I set it to 500.
Worked like a charm.
Thank you!

500 USED to be the default for it, but some time ago they changed the default to 250, and sometimes folks run into what happened to you, at that 250 setting.
 
Soooooo, lots of folks have just gone in and altered those settings back up to 500, and just like what you found, the dropped notes stops happening.
 
Bob Bone

GBB
I set it to 500.
Worked like a charm.
Thank you!

 Hey, GBB - Would you mind either flagging the thread as Answered or perhaps edit the subject line of your original post of the thread, to add something like 'Solved'?  It makes it easier for others to know this thread actually shows a solution to the issue - if folks are searching on how to fix this issue, and it also lets others who  want too help know ahead of time that the problem was resolved - rather than them reading through a bunch of posts to see if they could help, only to find out it was already resolved.  Thanks - it's kind of a nice guy thing to do. :)
 
GLAD you have this working now, for you. :)
 
Bob Bone